1089856 has 14 divisors (see below), whose sum is σ = 2162810. Its totient is φ = 544896.

The previous prime is 1089841. The next prime is 1089863. The reversal of 1089856 is 6589801.

It can be written as a sum of positive squares in only one way, i.e., 1032256 + 57600 = 1016^2 + 240^2 .

It is a super-2 number, since 2×1089856² = 2375572201472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8451 + ... + 8578.

2^1089856 is an apocalyptic number.

1089856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1089856 is a deficient number, since it is larger than the sum of its proper divisors (1072954).

1089856 is an equidigital number, since it uses as much as digits as its factorization.

1089856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17041 (or 17031 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 1089856 is about 1043.9616851207. The cubic root of 1089856 is about 102.9097144540.

Subtracting 1089856 from its reverse (6589801), we obtain a palindrome (5499945).

The spelling of 1089856 in words is "one million, eighty-nine thousand, eight hundred fifty-six".